\begin{tikzpicture}
    \tkzDefPoint(0,0){O}
    \tkzDefPoint(215:1.5){A}
    \tkzDefPoint(325:1.5){B}
    \tkzDefPoint(40:1.5){C}
    \tkzDefPoint(100:1.5){D}

    \tkzDrawPolygon(A,B,C,D)
    \tkzDrawCircle[thick](O,A)
    \tkzDrawPoint(O)
    \tkzLabelPoints[left](A)
    \tkzLabelPoints[right](B,C,O)
    \tkzLabelPoints[above](D)
\end{tikzpicture}

